> It would require me to write a custom paint function for every single control, which would take so much time I could raise a family in the meantime. Implemen

> It would require me to write a custom paint function for every single control, which would take so much time I could raise a family in the meantime. Implementing a custom paint routine is how you do theming in many UI toolkits. I get the impression the author is looking for a toolkit with declarative theming, like CSS.